Window fastener



Oct.. 9, 1928.

c. F. POLAQK WINDOW FASTENER Filed April 30. 1927 naar* hat@ orienta-vs Francis nonnen, or YORK, rnilinsiivanre.

.winnow resuelven.

l y application filed april 30, i927.' fseriai no. 187,905.

rThis invention relates to window fasteners of an automatic type, that is to say, which will automatically latch when Ythe two sashes are moved into a window closed position.

The invention consists inproviding a casing member containing a spring pressed latch element which has a handle portion project-1 ing therefrom, said casing being adapted to be secured to one window sash, and a complementary shell having a projection or de'tent for automatic engagement with the latch when the two window sashes are brought lto-' gether.`

The invention further consists in the novel arrangement, combination and construction of parts shown and described.

1n the drawings :e l j v Fig. 1 is a perspective view showing one embodiment of my invention.

Fig. 2 is a topl plan view.

Fig. 3 is a bottom view.

Fig. 4 is a sectional elevation along the line Hof Fig. 2. Y

' Fig. 5 is a side view of one ofthe casing elements.

Fig. 6 is a detail of the latch.

In the embodiment illustrated, I have shown a window sash at 1 to which is secured a casing 2 having preferably a turtle back portion 3 and a window ll.

A latch element comprising the` latch proper 5 and a handle 6 angularly disposed thereto, lis pivoted to the casing 2 as by pin 7. A projecting stud 8 on the latch. v5 is encircled by a spring 9, one end 9a of the spring engaging the latch 5, the other end 9b of the spring engaging the casing wall. In the form shown, the latch proper 5 is provided with a boss 11 upstanding from the end thereof, of substantially triangular form,l adjacent to and formed by a cut away section 12. The 4under edge 13.0f the latch 5 is rounded off for a purpose specified hereinafter. Y

It will be observed that theturtle back por-V g tion of the housing coversthe spring and pivot portion of the mechanism, thus protecting the same from dirt and preventing access to these parts when the sashes are together.

rlhe handle 6. projects through the window or open part of thelcasing element so asl to be readily grasped and manipulated in unlatching and opening the casement or window.

The other or complementary shell 14 is shaped similarly to the casing 2 except that no vwindow is provided. Cut into the top edge its complementary shell 2 is a recess 15' having one of its edges beveled asV at'l to be slidiiioly engaged bythe latch edge 13. Beneath the beveled portionrll provide a lug 17 of substantiallytriangular form pro-l jecting downwardly from the under face of the shell to adjacent its edge. `One' side of this lugv 17 forms in effect an extension of one of the side walls of the recess 15. `l/Vhen the parts are latclied, the bossv11 on the latch end 5 is adapt-ed to be behind the lug 17 and this lug occupies a position in the cut away section12 as shown in Figs. 3 and 4.

.t is to be noted that the boss and stud are similarly shaped but reversely placed and that when the parts are in` latched position their meeting faces make an angle with the meeting edges of the complementaryshells.

This has a distinct advantage in that should the window sashes become warped, and the Y shells become therebyV slightly askew, the latch and boss may still engage yeach other thus allowing considerable latitudefduring the window life.

In practice, each shell is to be secured tov one of the meeting rails of a window sash, so.v y that when the sashes are in the window yclosed .Y

position, the two shells will lie together, thev boss .11 behind the lug 17, and this lug in the cut away section 12.v Y v ATounlatch the window, the handle 6 is pressed toward the windowV pane, which strike the beveled face 16 of the shell 14. andi slide over the vsame while the sash isbeing moved downwardly, and against vthe tension Y of the spring 9,'until the latch end 5 clears the lug 17. At this point the boss 11 will snap behind the lug and the window will be secure.

It will be observed that by the use of these instrumentalities, a latch is provided of simple construction, which will automatically lock and which may be readily and quickly y n released, which' has all its moving` parts enclosed and which is extremely simple and cheap to construct. y What is claimed is: y A window-latch comprising a casing'attaelied'to tine window sash, a pivoted l pressed latch therein, a complementary shell adapted to beV attached to the other window sash, atriangular Stud projecting downwarding. edges of the complementary-shells the latch being normally pressed outwardly by its spring `beyond the periphery ofthe-first 10 lnentionedshell, said last mentioned shell having a cutaway portion to clear the projecting end of the latch', said shell having a portion of its Surface adjacent the Cut-away portion beveled to facilitate the passage of the 15 latch end throuoh the cut-awa Jortion. i Az: i In testimony whereof, I a'liX myrsignature.

CHARLES FRANCIS POLACVK. 

